Coal foe teanspoetation



(No Model.) v W. O. ANDREWS.

APPARATUS FOR- PREPARING GOAL FOR TRANSPORTATION.

Patemed July 2 1893.

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UNITED STATES PATENT OFFICE.

WALLACE O. ANDREWS, OF NEW YORK, N. Y.

APPARATUS FOR PREPARING COAL FOR TRANSPORTATION.

SPECIFICATION forming part of Letters Patent No. 502,062, dated July 25,1893.

Application filed October 28, 1892. Serial No. 450,229. (No model.)

To all whom it may concern.-

Be it known that I, WALLACE O. ANDREWS, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Apparatus forPreparing Coal for Transportation; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to apparatus for preparing for transportationthrough conduits, coal which is to be mixed in a state of fine divisionwith Water after the manner of the procedure described in Letters-Patentof the United States granted me March 31, 1891, No. 449,102.

The object of the present invention is ina ready, cheap, and efiicientmanner to reduce coal to a state of fine division, and mixit with water,thus presenting it for transportation by pumping through pipes orconduits.

With this object in view, the invention resides in the construction andarrangement of breaking, washing, pulverizing, separating, classifying,mixing and conveying devices, as hereinafter set forth and claimed.

The invention is illustrated in the accompanying drawing rather in thenature of a diagram, in which, the figure represents a verticalsectional view of a plant constructed in accordance with my invention,the working parts being shown in full lines.

In the drawing: A represents a platform or floor upon which thesubstance to be treated is either dumped or upon which a car, cart, orthe like may run. From the platform A, extends a chute a, the lower endof which is over the upper end of a breaker B. This breaker ispreferably of akind used for crushing stone or iron ore, and is to breakup the coal into the most suitable size for washing, that is to say, notto a powder, but rather to a granular condition. Motion is imparted tothe moving parts of the breaker through a belt B extending from adriving-pulley I.

Arranged adjacent to the breaker and preferably below the same is a jigger or washer C,

by which foreign substances such as slate,'

sulphur or other impurities are separated from the coal. A pulverizer D,is arranged to receive the coal from the washer or j igger. Thepulverizer is of such construction as to reduce the coal to a finepowder adapting it when mixed with water to be readily forced throughpipes or conduits to a distance. The jigger and pulverizer are drivenrespectively by the belts O and D The pulverizer D has an outlet chuted, leading into a revolving screen E, set at an incline and driven byabelt 6, thus forming a conveyer for the coal, and at the same time meansfor separatingthe finerfrom the coarser portions of the coal.

Below the screen E, is a receptacle E, into which drops the finelypulverized coal, and that part of the coal which is too large to passthrough the meshes of the screen is carried by the screen and depositedin a receptacle E An endless belt conveyer F, is arranged to carry thepowdered coal from the receptacle E to the upper end of a hopper G intowhich it is discharged.

A conveyer H, passes from the receptacle E to the upper end of a chute Dwhich extends down to the pulverizer D, so that the coal which hasescaped reduction to powder from being passed once through thepulverizer is subjected to another reduction. The conveyers F, and H,are driven by belts F and H respectively.

The lower end of the hopper G, terminates in a spout G which emptiesinto a cylinder or box G arranged below the spout. In the cylinder orbox is placedv a screw conveyer g, by which the powdered coal from thehopper is conveyed and discharged into a mixing chamber below thehopper. Motion is imparted to the screw-conveyer through a stem gprojecting from the same and carrying at its outer end a pulley greceiving a belt 9 from a main driving pulley I. The spout G2 is soconnected to the hopper G as to be capable of a slight vibratorymovement, as by supporting straps 9 by which the spout is held in properposition, relative to the hopper G and shaking motion is imparted toitthrough apin g projecting from the stem 9 and a correspondingprojection f from the spout, arranged in the path of the rotation of thepin or knocker g. It will be seen that by this means, the spout is keptconstantly vibrating during the operation of the apparatus, and cloggingof the pulverized coal is prevented.

The mixing of the pulverized coal with water is accomplished in a mixingchamber J placed in a position to receive the discharge from the spout GIn this chamber, and preferably near its lower end, is placed an agi-.tator j, the stem of which projects upward and is provided with a pulleyj receiving a belt 7' from the driving pulley I. The form of theagitator j, is such that when motion is imparted to it the contents ofthe mixing chamber are constantly thrown upward, in-

suringathorough mixing and preventing the packing of the coal in thebottom of the mixing chamber.

A pipe K is placed at the upper end of the mixing chamber, and throughthis pipe is introduced water which is to be mixed with the pulverizedcoal in proper proportions.

A pump L of any suitable construction is receptacle below the screen andthe hopper, a

conveyer extending from the receptacle at the end of the screen, and aconduit from the conveyer to the pulverizer, substantially as described.

2. An apparatus for preparing coal for transportation, comprising apulverizer, a hopper for receiving the pulverized material, means forconveying the pulverized substance to the hopper, a mixing chamberarranged adjacent to the hopper, and a water inlet entering the mixingchamber, substantially as described.

3. In an apparatus for preparing coal for transportation, comprising apulverizer, a hopper for receiving the pulverized substance, a movablespout attached to the hopper, means for shaking the spout, a mixingchamber arranged below the hopper, a water inlet leading to the mixingchamber, and an agitator in the mixing chamber, substantially asdescribed.

4. In an apparatus for preparing coal for transportation, a pulverizer,a hopper for receiving the pulverized substance, a movable spout havinga projection, a screw-conveyer arranged adjacent to and communicatingwith the spout, the shaft of the conveyer being provided with aprojection designed to engage the projection from the spout, and amixing chamber, substantially as described.

5. In an apparatus for preparing coal for transportation, a breakerwhereby the coal is reduced, a washer whereby foreign matter isseparated from the coal, a pulverizer, an inclined screen connected withthe pulverizer, a receptacle below the screen for the fine particles,and a second receptacle at the end of the screen for the coarserparticles, a hopper for receiving the pulverized coal, a conveyerbetween the hopper and the receptacle for receiving the fine particles,a conveyer extending from the receptacle at the end of the screen, and aconduit connecting the conveyer and the pulverizer, substantially asdescribed.

6. In an apparatus for preparing coal for transportation, a breakerwhereby the coal is reduced, a washer by which foreign matter isseparated from the substance, a pulverizer, an inclined screen adjacentto the pulverizer, a receptacle below the screen for receiving the fineparticles, a hopper for receiving the pulverized coal, a conveyerextending from the receptacle below the screen to the hopper, a movablespout attached to the hopper, a conveyer arranged below the movablespout,

the spout being provided with a projection,

and the shaft of the conveyer also being provided with a projection, amixing chamber,a water inlet into the mixing chamber, an agitator withinthe mixing chamber, and a pump connected with the mixing chamber,substantially as described.

In testimony whereof I .afiix my signature in presence of two witnesses.

WALLACE C. ANDREWS. Witnesses:

W. F. WEIss, HERMANN SEMMEL.

